Valve for pneumatic tires.



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VALVE FOR PNEUMMIC TIRES. AWLICATION FILED mm. Zai 19m.

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v ISRAEL KRNETSKY, 0F CHELSEA, .lllillD DANEL It". SULLIVAN, 0l? Btlilllldlll", llllltliitldtlllll' Specification of Letters Patent.

United States, have invented certain new and useful Improvements in Valves for Pneumatic lires, oiE which the following, is a full, clear, and exact specification.

rlhe object ofthis invention is the con struction of a tire valve wherein the valve stem can be shorter than is new the case; which shall havev fewer parts; which does not have to seat against the bottom ol' the valve stem; which can use a shorter spring, and` shall have further advantages herein-v after set forth.

ln the drawings forming part or this specication, Figure l is a central longitudinal section of a tire' valve embodying our improvements.' Fig. 2 is a side elevation of the valve alone. Fig. 3 is an elevation of the operative portion of the valve. Fig. fl is an elevation of the ,valve seat member alone.

ln Fig. 1, the reference numeral 1 designates a portion of a pneumatic tire; El is the valve Vstem attached to the tire by a nut 3 coacting with a shoulder ll; and 5 is the valve stem cap, the parts thus far recited being substantially like those now on the merkel.

lhe valve seat member 6 comprises an eri-- ternally threaded body adapted to be screwed within the correspondingly threaded interior of the valve stem 2; a square portieri 7 adapted to be engaged by the end 9 olf the cap 5 for enabling it to be screwed in place and a cylindrical portion l0 projecting be low the threaded body for receiving a leather or rubber washer or tubular plug; 12 which by its eoaction with the constricted section oli' throat 11 of the stem 2, prevents the escape of air thereat. As shown in Fig'. l, this valve seat member is tubular throughout its length.

T he valve comprises a cylindrical body 13 carrying a rubber washer 14 at its end from which rises a slender steml'. lit the lower end of the valve body 13 is a conical portion 16 recessed in its 'under surface.

A slender helical spring 1,7 .surrounds the valve body 13, having; one end gripping a groove 1&5 at the end oli the cylindrical porlion l() ot the valve seat number, the other lllatented dan.. Vt', lltllllhl.

Application filed March 2E, 19M. Serial llo. M5173.

end of the spring grippingithe small end of the cone 16; the spring being adapted to resiliently pull the valve washer lll into air tight engagement with the end of the por4 tion 10, which composee the valve seat.

The interior of the squared. portion 'l is made slightly larOfer than the remainder ot the hole through the member 6, and the extremity of the stem 15 -is flattened or made starshape in a well known manner for preyentin'g the valve :trom being,r pushed too :tar 1n the valve stem, this flattening; being done after the stem has beenintroduced within the body.

The device is used in a vvell known man ner," the advantages comprising sensitiveness due to the slender and short helical i parts, Whereas none with which we are acquainted have less than eight or nine. lllthough the valvestem as illustrated in Fig. l is shorter than almost all others, it is evi dent that severa-l of the parts oli" the valve, as the tubular portion l0, the plug 11 and the body 13, can be materially shortened as compared with their proportions shown in the drawings, without in the slightest degrec interfering with the operativeness of. the valve. The concavity et the conical valve-end 16 is designed to aid the outward rush of air from 'within the pneumatic tire in closing the valve.

What we claim is:

1. er tire valve comprising a valve stem having a tubular member therein, a valve havingl a. slender stem within the tubular member, the latter having an annular groove around its lower portion, the valve being elongatedv and formed with an annular depression at its lower end, and a heli cal spring having one end gripping 'said groove and its other end grippingsaid annular depression and yieldingly drawing the valve into air-tight engagement with the lower end et the tubular member.

2. A. tire valve comprising a valve stem, a tubular member therein havhiggl an enlarged body for enablingl it to be fastened in the stem, the lower portion of the tubular member being cylindrical and formed with au annular gifoove near lower eneh a yielding; washer surrounding' the upper por tion of the said cylindrical portion tor malr- Mill llll

ing au zfsltght cominci vih *che ntrior of a helical spring mvnff one he 'MVG stem, a valve cyn cal in om ,szzd groove and its 0th and having :L slam@ if siem 'rising *femm @ne amical pojesizun end through fue said tubula m: ber; a vavwsnd. 5 yielding Wagher :ibm-,lt the owaz: @am .said En uestmomf dut *a (J1-i311 X stem, th@ lower end of Said valve being so zfcreumo .SQL om.

fol-med with L comical termination having; lv'rww lts base beow and con 1J, 1' u' pa e115;

bring; QSS in man 

